import math

KAPPA = 2.41798793102
PI = 3.14159265358
CONSTANT_P = (4 / 3) * PI * (KAPPA / PI) ** 1.5
EXP = math.exp(1)

FEATURES = {
    "Donor": [1.0, True, (0.5019607843137255, 0.5019607843137255, 1.0)],
    "Acceptor": [1.0, True, (1.0, 0.5019607843137255, 0.5019607843137255)],
    "PosIonizable": [1.0, False, (0.8352941176470589, 0.5019607843137255, 1.0)],
    "NegIonizable": [1.0, False, (1.0, 0.6039215686274509, 0.2)],
    "Aromatic": [1.0, True, (1.0, 0.8862745098039215, 0.5019607843137255)],
    "Hydrophobe": [1.0, False, (0.5019607843137255, 1.0, 0.5019607843137255)],
}
